CN111982766A - Automatic in-situ detection device and method for sludge settlement ratio - Google Patents
Automatic in-situ detection device and method for sludge settlement ratio Download PDFInfo
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- CN111982766A CN111982766A CN202010969653.6A CN202010969653A CN111982766A CN 111982766 A CN111982766 A CN 111982766A CN 202010969653 A CN202010969653 A CN 202010969653A CN 111982766 A CN111982766 A CN 111982766A
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- 239000010802 sludge Substances 0.000 title claims abstract description 69
- 238000011065 in-situ storage Methods 0.000 title claims abstract description 32
- 238000000034 method Methods 0.000 title claims abstract description 14
- 238000001514 detection method Methods 0.000 title claims description 29
- 238000004062 sedimentation Methods 0.000 claims abstract description 59
- 239000007788 liquid Substances 0.000 claims description 36
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 239000004973 liquid crystal related substance Substances 0.000 claims description 5
- 238000009434 installation Methods 0.000 claims description 4
- 238000005406 washing Methods 0.000 claims description 4
- 239000000126 substance Substances 0.000 claims description 3
- 238000005070 sampling Methods 0.000 abstract description 8
- 238000005259 measurement Methods 0.000 description 11
- 238000010586 diagram Methods 0.000 description 9
- 238000005273 aeration Methods 0.000 description 4
- 238000012806 monitoring device Methods 0.000 description 4
- 230000002572 peristaltic effect Effects 0.000 description 4
- 238000004140 cleaning Methods 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 230000003670 easy-to-clean Effects 0.000 description 2
- 238000001125 extrusion Methods 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000031700 light absorption Effects 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N15/00—Investigating characteristics of particles; Investigating permeability, pore-volume or surface-area of porous materials
- G01N15/04—Investigating sedimentation of particle suspensions
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N21/00—Investigating or analysing materials by the use of optical means, i.e. using sub-millimetre waves, infrared, visible or ultraviolet light
- G01N21/17—Systems in which incident light is modified in accordance with the properties of the material investigated
- G01N21/25—Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands
- G01N21/31—Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry
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- Activated Sludge Processes (AREA)
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Abstract
The invention discloses a device and a method for automatically detecting a sludge settlement ratio in situ, wherein the device comprises the following steps: the rotary gate is arranged at an opening at the bottom end of the settling pipe; the motor is arranged at the upper end of the sedimentation pipe and is connected with the rotary gate through a connecting shaft; the air pipe is arranged at the top end of the sedimentation pipe and communicated with the sedimentation pipe, and a first electromagnetic valve is arranged on the air pipe and can be connected with an external air source; the exhaust pipe is arranged at the top end of the settling pipe and communicated with the settling pipe, and a second electromagnetic valve is arranged on the exhaust pipe; the first photometer and the second photometer are respectively arranged at different height positions on the outer side of the lower part of the sedimentation pipe, and the light paths of the two adjacent photometers are in reverse parallel; and the control device is respectively electrically connected with the motor, the first electromagnetic valve, the second electromagnetic valve and each photometer, can receive signals of each photometer and controls the action of the motor, the first electromagnetic valve and the second electromagnetic valve according to a set program instruction. The device can overcome human error, and automatic sampling, automatic analysis activated sludge subside characteristic.
Description
Technical Field
The invention relates to the field of detection equipment for sewage treatment, in particular to an in-situ automatic detection device and method for a sludge settlement ratio.
Background
In a sewage treatment plant applying a traditional activated sludge process, a sludge sedimentation ratio (SV) is a conventional index for monitoring sludge concentration and early warning sludge bulking, and generally needs manual timing, fixed-point sampling, standing waiting, calculation and analysis, and is long in time consumption and large in error. The SV is determined by a conventional method, namely, the mixed liquor is taken from the outlet of an aeration tank and placed in a 1L graduated cylinder, and after standing for a period of time (such as 30min), the ratio of the volume occupied by the settled sludge to the volume (1L) of the mixed liquor is SV.
An on-line automatic monitoring device is mostly adopted for measuring the sludge settlement ratio, for example, Chinese invention patent 201810624803.2 discloses an on-line automatic monitoring device for the sludge settlement ratio, a cock which is matched with the inside of a measuring tube is arranged in the measuring tube, the upper end of the cock is connected with a motor through a screw rod, a sample inlet tube which is communicated with the measuring tube is arranged at the lower end of the measuring tube, a sampling control valve is arranged on the sample inlet tube, a sample discharge tube which is communicated with the measuring tube is arranged at one side of the lower end of the measuring tube, a sample discharge control valve is arranged on the sample discharge tube, an internal photometer is arranged at the outer side of the measuring tube, an external photometer is arranged at the outer side of the internal photometer, the motor, the sampling control valve, the sample discharge control valve, the internal photometer and the. However, the problem of high failure rate of the on-line automatic monitoring device for sludge sedimentation ratio is caused by excessive mechanical structures; the sludge is easy to deposit and not easy to clean; the peristaltic action of the pump and the narrow liquid inlet pipeline easily cause the crushing of partial flocs, thereby influencing the test result. Another chinese patent 201911416167.5 discloses a device for on-line monitoring of sludge sedimentation performance, wherein a control pump outlet is connected to a first valve, the first valve is connected to a transparent standard metering container, an infrared photoelectric switch emitting end is fixedly mounted on a mounting bracket, a linear guide rail is fixedly mounted on a column, a slider is mounted on the linear guide rail, a slide seat is fixedly mounted on the slider, the infrared photoelectric switch emitting end is mounted on the slide seat and a nut is mounted on the slide seat, a stepping motor is fixedly mounted on a motor mounting seat, a ball screw is mounted on the column and two ends of the ball screw are mounted on the column through bearing seats, the stepping motor is connected to the ball screw on the column through a coupling and the ball screw is mounted on the nut, and a water outlet hole at the bottom of the transparent standard metering container is connected to an air release. However, the device for monitoring the sludge sedimentation performance on line has the disadvantages that the pipeline is complicated, the floc is easy to block and is not easy to clean; the peristaltic action of the pump and the narrow liquid inlet pipeline easily cause the crushing of partial flocs, thereby influencing the test result.
In conclusion, the existing automatic detection device for sludge sedimentation mostly has the problems that the mechanical structure is complex, the sampling pipeline is narrow and small, and the flocs are damaged by peristaltic extrusion of the pump, so that the accuracy of the measurement result is influenced.
Disclosure of Invention
Based on the problems in the prior art, the invention aims to provide an in-situ automatic detection device for a sludge settlement ratio, which can solve the problems that the existing online automatic monitoring device for detecting the sludge settlement ratio is complex in mechanical structure, and the accuracy of a measurement result is influenced due to the fact that a sample introduction pipeline is narrow and flocs are damaged by peristaltic extrusion of a pump.
The purpose of the invention is realized by the following technical scheme:
the embodiment of the invention provides an in-situ automatic detection device for sludge settlement ratio, which comprises:
the device comprises a sedimentation pipe, a rotary gate, a motor, a connecting shaft, an air pipe, a first electromagnetic valve, an exhaust pipe, a second electromagnetic valve, at least two photometers and a control device; wherein the content of the first and second substances,
the rotary gate is arranged at the bottom opening of the settling tube and can open or close the bottom opening of the settling tube;
the motor is arranged at the upper end of the settling pipe, is connected with the rotary gate through the connecting shaft and can open or close the rotary gate;
the air pipe is arranged at the top end of the sedimentation pipe and communicated with the sedimentation pipe, the first electromagnetic valve is arranged on the air pipe, and the air pipe can be connected with an external air source;
the exhaust pipe is arranged at the top end of the settling pipe and communicated with the settling pipe, and the second electromagnetic valve is arranged on the exhaust pipe;
the photometers are respectively arranged at different height positions on the outer side of the lower part of the sedimentation pipe, and the light paths of two adjacent photometers are in reverse parallel;
the control device is respectively electrically connected with the motor, the first electromagnetic valve, the second electromagnetic valve and the photometer, can receive signals of the photometers and controls the motor, the first electromagnetic valve and the second electromagnetic valve according to set program instructions.
The embodiment of the invention also provides an in-situ automatic detection method for the sludge settlement ratio, and the method adopts the in-situ automatic detection device for the sludge settlement ratio, presets the opening and closing rules and the operation time of the electromagnetic valve through a control device of the in-situ automatic detection device for the sludge settlement ratio, and comprises the following steps:
step 1) the control device controls to close the first electromagnetic valve, open the second electromagnetic valve, control the motor to open the rotary gate through the connecting shaft, and the mixed liquid is filled in the sedimentation pipe under the action of water pressure;
step 2) the control device controls the motor to close the rotary gate through the connecting shaft, and standing is carried out according to preset time until sludge is settled;
step 3) the control device controls to close the second electromagnetic valve, opens the first electromagnetic valve, the motor opens the rotary gate through the connecting shaft, air enters the sedimentation pipe through the air pipe to press out liquid in the sedimentation pipe from the rotary gate, each photometer measures luminosity signals of the change of the liquid in the sedimentation pipe and sends the luminosity signals to the control device, and the control device calculates mud level according to the luminosity signals of each photometer to obtain the sludge sedimentation ratio;
and 4) when the luminosity signal measured by the photometer at the bottom end is an air signal, the control device confirms that the sedimentation pipe is emptied and the washing is finished, controls to close the first electromagnetic valve and the second electromagnetic valve, and controls the motor to close the rotary gate through the connecting shaft to finish the primary detection.
According to the technical scheme provided by the invention, the device and the method for automatically detecting the sludge settlement ratio in situ have the beneficial effects that:
the liquid inlet of the mixed liquid can be completed in situ by the driving of liquid level pressure through arranging a rotary gate controlled by a motor and matching an air pipe and an exhaust pipe, and the determination of a sedimentation result is not influenced because no pump or a thin branch pipeline exists, so that flocs cannot be damaged; the liquid pipeline only has one straight settling tube, has no complex structure, is not easy to block and can stably run for a long time; after each measurement, the interior of the settling tube is washed alternately by water and gas, so that the settling tube is convenient to clean and is not easy to scale by sludge; the equipment has no complex mechanical structure, is convenient to maintain and has low replacement cost of original parts; the control device can realize the automatic measurement of the sludge settleability in a timed and uninterrupted manner. The device simple structure, simple to operate easily maintain, easily wash, can realize the long period steady operation of equipment, can overcome human error during the measurement, automatic sampling, automatic analysis activated sludge subsides the characteristic.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on the drawings without creative efforts.
FIG. 1 is a schematic diagram of an in-situ automatic detection device for sludge sedimentation ratio according to an embodiment of the present invention;
fig. 2 is a schematic diagram of a change of a state in a settling pipe in the method for automatically detecting a sludge settling ratio in situ according to an embodiment of the present invention, wherein the diagram includes a schematic diagram of a state in which the settling pipe is filled with a mixed liquid, a schematic diagram of a standing state of the settling pipe, a schematic diagram of a state in which a sludge settling ratio is measured, a schematic diagram of a state in which the settling pipe is emptied, and a schematic diagram of a state in which the settling pipe is measured again;
FIG. 3 is a schematic diagram showing the state of the time difference between photometric signals of two photometers in the device for automatically detecting sludge sedimentation ratio in situ according to the embodiment of the present invention;
FIG. 4 is a schematic view of the state of a mud-water interface of photometric signals of two photometers in the device for automatically detecting sludge sedimentation ratio in situ according to the embodiment of the present invention;
the parts corresponding to each mark in the figure are: 1-a settling tube; 2-rotating the gate; 3-connecting the shaft; 4-a motor; 5-air pipe; 6-gas source; 7-a first solenoid valve; 8-an exhaust pipe; 9-a second electromagnetic valve; 10-a first photometer; 11-a second photometer; 12-a control device; 13-liquid crystal display screen.
Detailed Description
The technical solutions in the embodiments of the present invention are clearly and completely described below with reference to the specific contents of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments of the present invention without making any creative effort, shall fall within the protection scope of the present invention. Details which are not described in detail in the embodiments of the invention belong to the prior art which is known to the person skilled in the art.
As shown in fig. 1, an embodiment of the present invention provides an in-situ automatic detection apparatus for sludge sedimentation ratio, including:
the device comprises a sedimentation pipe 1, a rotary gate 2, a motor 4, a connecting shaft 3, an air pipe 5, a first electromagnetic valve 7, an exhaust pipe 8, a second electromagnetic valve 9, at least two photometers and a control device 12; wherein the content of the first and second substances,
the rotary gate 2 is arranged at the bottom opening of the settling pipe 1 and can open or close the bottom opening of the settling pipe 1;
the motor 4 is arranged at the upper end of the settling pipe 1, and the motor 4 is connected with the rotary gate 2 through the connecting shaft 3 and can open or close the rotary gate 2;
the air pipe 5 is arranged at the top end of the settling pipe 1 and communicated with the interior of the settling pipe 1, the first electromagnetic valve 7 is arranged on the air pipe 5, and the air pipe 5 can be connected with an external air source 6;
the exhaust pipe 8 is arranged at the top end of the settling pipe 1 and communicated with the interior of the settling pipe 1, and the second electromagnetic valve 9 is arranged on the exhaust pipe 8;
the photometers 11 are respectively arranged at different height positions on the outer side of the lower part of the settling tube 1, and the light paths of two adjacent photometers are in reverse parallel;
the control device is electrically connected with the motor 4, the first electromagnetic valve 7, the second electromagnetic valve 9 and the photometers respectively, can receive signals of the photometers and can control the motor 4, the first electromagnetic valve 7 and the second electromagnetic valve 9 according to set program instructions.
In the above automatic detection device, the control device is a control device having a liquid crystal display 13.
In the automatic detection device, the sedimentation pipe is a long straight pipe body. The settling tube with the shape has simpler structure and more convenient sampling and cleaning.
The above automatic detection device further comprises: and the air source or the vacuum pump is connected with the air pipe 5. Preferably, the air source can also adopt an aeration branch pipe of the aeration tank. When the vacuum pump is adopted, the sedimentation pipe is lifted, but the bottom of the sedimentation pipe is still below the liquid level, and negative pressure is formed inside the sedimentation pipe through the connected vacuum pump, so that the liquid on the surface of the pool is forced to be lifted to the sedimentation pipe.
Preferably, in the above automatic detection device, two photometers are used, such as a first photometer 10 and a second photometer 11, the first photometer 10 and the second photometer 11 are installed at different heights outside the lower portion of the settling tube 1, and the light paths of the two photometers are antiparallel, so that the first photometer 10 and the second photometer 11 measure photometric signals, and transmit the photometric signals to the control device 12 for recording, and the control device 12 calculates the sludge settling ratio according to the sudden time difference of the photometric signals measured by the first photometer 10 and the second photometer 11 and the position and distance between the first photometer 10 and the second photometer 11;
furthermore, more than two photometers can be arranged, the positions or the number of the photometers can be increased, and the mud position after settlement can be judged according to the signal jump time difference of the photometers with the number more than two and the positions and the distances of the photometers.
Referring to fig. 2, an embodiment of the present invention provides an in-situ automatic detection method for a sludge settlement ratio, which adopts the above-mentioned in-situ automatic detection device for a sludge settlement ratio, and presets an opening and closing rule and an operation time of an electromagnetic valve by using a control device 12 of the in-situ automatic detection device for a sludge settlement ratio, and includes the following steps:
step 1), a control device 12 controls to close a first electromagnetic valve 7, open a second electromagnetic valve 9, control a motor 4 to open a rotary gate 2 through a connecting shaft 3, and mixed liquid is filled in a settling pipe 1 under the action of water pressure;
step 2), the control device 12 controls the motor 4 to close the rotary gate 2 through the connecting shaft 3, and standing is carried out according to preset time until sludge is settled;
step 3) the control device 12 controls to close the second electromagnetic valve 9, opens the first electromagnetic valve 7, the motor 4 opens the rotary gate 2 through the connecting shaft 3, air enters the sedimentation tube 1 from the air tube 5 (constant flow) to press out the liquid in the sedimentation tube 1 from the rotary gate 2, the first photometer 10 and the second photometer 11 measure the luminosity signal of the liquid change in the sedimentation tube 1 and send the luminosity signal to the control device 12, and the control device 12 calculates the mud level according to the luminosity signal of each photometer to obtain the mud sedimentation ratio;
and 4) when the photometric signal measured by the photometer at the bottom is an air signal, the control device 12 confirms that the interior of the sedimentation pipe 1 is emptied and the washing is finished, controls to close the first electromagnetic valve 7 and the second electromagnetic valve 9, and controls the motor 4 to close the rotary gate 2 through the connecting shaft 3, so that the primary detection is finished.
In step 3 of the method, the control device 12 calculates the sludge level according to the photometric signals of the photometers 11 to obtain the sludge settlement ratio as follows:
determining a mud-water interface and a gas-liquid interface in the settling tube 1 according to two sudden jumps of photometric signals of adjacent photometers (namely, two adjacent photometers), calculating the liquid level descending speed of mixed liquid according to the time difference and the installation height difference of the sudden jumps of the adjacent photometers (namely, the two adjacent photometers), and calculating the mud level according to the liquid level descending speed of the mixed liquid to obtain the sludge settlement ratio.
In step 2 of the method, the predetermined time for standing is as follows: greater than or equal to 30 minutes.
The embodiments of the present invention are described in further detail below.
As shown in fig. 1, an embodiment of the present invention provides an in-situ automatic detection apparatus for sludge sedimentation ratio, including: a sedimentation pipe 1, a rotary gate 2 which is expected to be matched with each other is arranged at the bottom end of the sedimentation pipe 1, the rotary gate is connected with a motor 4 arranged at the upper end of the sedimentation pipe 1) through a connecting shaft 3, an air pipe 5 arranged at the top end of the sedimentation pipe 1 is connected with an air branch pipe of an aeration tank of an air source 6, a first electromagnetic valve 7 is arranged between the air pipe 5 and the air source 6, an exhaust pipe 8 arranged at the top end of the sedimentation pipe 1 is communicated with the atmosphere, a first electromagnetic valve I9 is arranged at the position where the exhaust pipe 8 is communicated with the atmosphere, a first photometer 10 and a second photometer 11 are arranged at different heights on the outer side of the lower part of the sedimentation pipe 1, the light paths are in reverse parallel (in the embodiment, two photometers are taken as an example, or more than two photometers can be arranged), the motor 4, the first electromagnetic valve 7, the control device 12 is provided with a liquid crystal display 13.
Referring to fig. 2, an embodiment of the present invention further provides an in-situ automatic detection method for a sludge settlement ratio, where the in-situ automatic detection device for a sludge settlement ratio includes the following steps:
step 1), the control device controls the first electromagnetic valve 7 to be closed, the second electromagnetic valve 9 to be opened, and the motor 4 drives the connecting shaft 3 to open the rotary gate 2, so that mixed liquid is filled in the settling tube 1 under the action of water pressure;
step 2) the control device controls the motor 4 to drive the connecting shaft 3 to close the rotary gate 2, and the rotary gate is kept stand for a period of time, such as 30min, until sludge is settled;
step 3) the control device controls the second electromagnetic valve 9 to be closed, the first electromagnetic valve 7 to be opened, the motor 4 drives the connecting shaft 3 to open the rotary gate 2, and air enters the sedimentation pipe 1 from the air source 6 to press liquid out of the rotary gate 2; the first photometer 10 and the second photometer 11 measure photometric signals, the photometric signals are transmitted to the control device 12 and recorded, and the control device 12 calculates the sludge settlement ratio according to the photometric signal jump time difference measured by the first photometer 10 and the second photometer 11 and the position and the distance between the first photometer 10 and the second photometer 11;
in the step 3), the change of the photometric signal is as shown in fig. 3 and 4, the mud-water interface is distinguished based on two sudden jumps of the light absorption value, the control device 12 calculates the liquid level descending speed of the mixed liquid according to the time difference and the installation height difference of the sudden jumps of the photometer, and the mud level is calculated to obtain the sludge settlement ratio.
And step 4), the control device receives an air signal measured by the second photometer 11, confirms that the sedimentation pipe 1 is emptied and finishes washing, controls to close the first electromagnetic valve 7, closes the second electromagnetic valve 9, and controls the motor 4 to drive the connecting shaft 3 to close the rotary gate 2, so that the measurement is finished, and the device can be ready to enter the next measurement.
In the next measurement, the control device controls to open the first electromagnetic valve 7, the motor 4 drives the connecting shaft 3 to open the rotary gate 2, and the mixed liquid enters the settling tube under the water pressure to enter the next measurement period.
Preferably, in the above method, the valve opening and closing rule and the operation time are programmed in the control device 12, and are interactively set through the liquid crystal display 13, which may be preset in the control device 12.
The in-situ automatic detection device for the sludge settlement ratio can drive the mixed liquid to enter the liquid in the in-situ mode by the liquid level pressure, and can not damage flocs and influence the settlement result determination due to the absence of a pump and a thin branch pipeline; the liquid pipeline only has one straight settling tube, has no complex structure, is not easy to block and can stably run for a long time; after each measurement, the interior of the settling tube is washed alternately by water and gas, so that the settling tube is convenient to clean and is not easy to scale by sludge; the equipment has no complex mechanical structure, is convenient to maintain and has low replacement cost of original parts; the control device can realize the automatic measurement of the sludge settleability in a timed and uninterrupted manner. The device has simple structure, convenient installation, easy maintenance, easy cleaning, automatic sampling and automatic analysis of the sedimentation characteristic of the activated sludge, can overcome human errors and realize long-period stable operation of equipment. The device can well solve the problems that the existing sludge settleability measuring system has a complex mechanical structure and poor operation stability; the water inlet system interferes flocs, and the determination accuracy is poor; the pipeline is easy to scale and form sludge, and the cleaning is inconvenient.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (7)
1. The utility model provides a sludge sedimentation is than normal position automatic checkout device which characterized in that includes:
the device comprises a sedimentation pipe (1), a rotary gate (2), a motor (4), a connecting shaft (3), an air pipe (5), a first electromagnetic valve (7), an exhaust pipe (8), a second electromagnetic valve (9), at least two photometers and a control device (12); wherein the content of the first and second substances,
the rotary gate (2) is arranged at the bottom opening of the settling pipe (1) and can open or close the bottom opening of the settling pipe (1);
the motor (4) is arranged at the upper end of the settling pipe (1), and the motor (4) is connected with the rotary gate (2) through the connecting shaft (3) and can open or close the rotary gate (2);
the air pipe (5) is arranged at the top end of the settling pipe (1) and communicated with the interior of the settling pipe (1), the first electromagnetic valve (7) is arranged on the air pipe (5), and the air pipe (5) can be connected with an external air source (6);
the exhaust pipe (8) is arranged at the top end of the settling pipe (1) and communicated with the interior of the settling pipe (1), and the second electromagnetic valve (9) is arranged on the exhaust pipe (8);
the photometers (11) are respectively arranged at different height positions on the outer side of the lower part of the settling tube (1), and the light paths of two adjacent photometers are in reverse parallel;
the control device is respectively and electrically connected with the motor (4), the first electromagnetic valve (7), the second electromagnetic valve (9) and each photometer, can receive signals of each photometer and controls the actions of the motor (4), the first electromagnetic valve (7) and the second electromagnetic valve (9) according to set program instructions.
2. The device for automatically detecting the sludge sedimentation ratio in situ as claimed in claim 1, wherein the control device adopts a control device with a liquid crystal display screen (13).
3. The device for automatically detecting the sludge sedimentation ratio in situ as claimed in claim 1 or 2, wherein the sedimentation pipe is a long straight pipe.
4. The device for automatically detecting the sludge sedimentation ratio in situ according to claim 1 or 2, further comprising: and the air source or the vacuum pump is connected with the air pipe (5).
5. An in-situ automatic detection method for sludge sedimentation ratio, which is characterized in that the in-situ automatic detection device for sludge sedimentation ratio of any one of claims 1 to 3 is adopted, and the opening and closing rules and the operation time of an electromagnetic valve are preset by a control device (12) of the in-situ automatic detection device for sludge sedimentation ratio, and the method comprises the following steps:
step 1), a control device (12) controls to close a first electromagnetic valve (7), open a second electromagnetic valve (9), control a motor (4) to open a rotary gate (2) through a connecting shaft (3), and mixed liquid is filled in a settling tube (1) under the action of water pressure;
step 2), the control device (12) controls the motor (4) to close the rotary gate (2) through the connecting shaft (3), and standing is carried out according to preset time until sludge is settled;
step 3), the control device (12) controls to close the second electromagnetic valve (9), the first electromagnetic valve (7) is opened, the motor (4) opens the rotary gate (2) through the connecting shaft (3), air enters the sedimentation tube (1) through the air pipe (5) to press out liquid in the sedimentation tube (1) from the rotary gate (2), all photometers measure luminosity signals of liquid change in the sedimentation tube (1) and send the luminosity signals to the control device (12), and the control device (12) calculates mud level according to the luminosity signals of all photometers to obtain the sludge settlement ratio;
and step 4) when the luminosity signal measured by the photometer at the bottom end is an air signal, the control device (12) confirms that the interior of the sedimentation pipe (1) is emptied and the washing is finished, controls to close the first electromagnetic valve (7) and the second electromagnetic valve (9), controls the motor (4) to close the rotary gate (2) through the connecting shaft (3), and finishes the primary detection.
6. The method for automatically detecting the sludge settlement ratio in situ as claimed in claim 5, wherein in the step 3), the control device (12) calculates the sludge level according to the photometric signal of each photometer (11) to obtain the sludge settlement ratio as follows:
and determining a mud-water interface in the settling tube (1) according to two sudden jumps of photometric signals of adjacent photometers, calculating the liquid level descending speed of the mixed liquid according to the sudden time difference and the installation height difference of the adjacent photometers (11), and calculating the mud level according to the liquid level descending speed of the mixed liquid to obtain the sludge settlement ratio.
7. The method for automatically detecting the sludge sedimentation ratio in situ as claimed in claim 5, wherein in the step 2), the standing is performed for a predetermined time: greater than or equal to 30 minutes.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114414444A (en) * | 2022-03-31 | 2022-04-29 | 北京博汇特环保科技股份有限公司 | Measuring device for sludge sedimentation ratio and measuring system for sludge volume index |
| CN114858669A (en) * | 2022-07-07 | 2022-08-05 | 江苏科德生态环保水处理有限公司 | Intelligent sludge settlement ratio detection device |
| CN115452748A (en) * | 2022-10-12 | 2022-12-09 | 连云港万泰医药辅料技术有限公司 | Detection device and detection method for methacrylic acid-methacrylic acid formic acid copolymer |
| CN115950799A (en) * | 2023-03-10 | 2023-04-11 | 天津创业环保集团股份有限公司 | Sludge settlement ratio testing equipment and method without damaging sludge form |
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2020
- 2020-09-15 CN CN202010969653.6A patent/CN111982766A/en active Pending
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| CN114414444A (en) * | 2022-03-31 | 2022-04-29 | 北京博汇特环保科技股份有限公司 | Measuring device for sludge sedimentation ratio and measuring system for sludge volume index |
| CN114858669A (en) * | 2022-07-07 | 2022-08-05 | 江苏科德生态环保水处理有限公司 | Intelligent sludge settlement ratio detection device |
| CN114858669B (en) * | 2022-07-07 | 2022-09-20 | 江苏科德生态环保水处理有限公司 | Intelligent sludge settlement ratio detection device |
| CN115452748A (en) * | 2022-10-12 | 2022-12-09 | 连云港万泰医药辅料技术有限公司 | Detection device and detection method for methacrylic acid-methacrylic acid formic acid copolymer |
| CN115452748B (en) * | 2022-10-12 | 2023-10-03 | 连云港万泰医药辅料技术有限公司 | Detection device and detection method for methacrylic acid-methacrylic acid formic acid copolymer |
| CN115950799A (en) * | 2023-03-10 | 2023-04-11 | 天津创业环保集团股份有限公司 | Sludge settlement ratio testing equipment and method without damaging sludge form |
| CN115950799B (en) * | 2023-03-10 | 2023-06-30 | 天津创业环保集团股份有限公司 | Sludge sedimentation ratio testing equipment and method without destroying sludge morphology |
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